const tagsView = {
  state: {
    visitedViews: [],
    cachedViews: []
  },
  mutations: {
    ADD_VISITED_VIEWS: (state, view) => {
      if (state.visitedViews.some(v => v.path === view.path)) return;
      state.visitedViews.push(
        Object.assign({}, view, {
          title: view.meta.title || "no-title"
        })
      );
      if (!view.meta.noCache) {
        state.cachedViews.push(view.name);
      }
    },
    DEL_VISITED_VIEWS: (state, view) => {
      for (const [i, v] of state.visitedViews.entries()) {
        if (v.path === view.path) {
          state.visitedViews.splice(i, 1);
          break;
        }
      }
      for (const i of state.cachedViews) {
        if (i === view.name) {
          const index = state.cachedViews.indexOf(i);
          state.cachedViews.splice(index, 1);
          break;
        }
      }
    }
  },
  actions: {
    addVisitedViews({ commit }, view) {
      commit("ADD_VISITED_VIEWS", view);
    },
    delVisitedViews({ commit, state }, view) {
      return new Promise(resolve => {
        commit("DEL_VISITED_VIEWS", view);
        resolve([...state.visitedViews]);
      });
    }
  }
};

export default tagsView;
